And alfred



(Np Model.)

J. T. SGHIMMOLLER.

Sewing Machine.

No. 240,466. Patented AprH 19,188l.

iflfllllillllllllllllllll lllllllllllllllllIllllllllllllIIIlllllIIllIIIIIIIIIIIIIHIIIIIIIIIIIH llllllilll!lHIlIlllllllilIi I lllllmlllllllllll Ivw- My 0 Y F 2W1 whmmmw WwTMa-eu W lap/Z :1 PETERS, MOTOMTHQGRAPr-I UNITED I STATES PATENT OFFICE.

JOSEPH T. SOHIMMOLLER, OF NEW YORK, N. Y., ASSIGNOR TO HIMSELF, JOHN \VEIFFENBAOH, OF WEST HOBOKEN, NEW JERSEY, AND ALFRED EMIL MOLTZ, OF NEW YORK, N. Y.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 240,466, dated April 19, 1881.

Application filed September 6, 1880. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH '1. ScHIMMoL- LER, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvementsin Sewing-Machines,of which the following is a specification.

This invention relates to an improved mechanism for producing the requisite motion of the shuttle and it consists in the combination of a crank-pin mounted on a rotating shaft, an oscillating arm for supporting the shuttle, and a slotted arm for imparting a rising-andfalling motion to the shuttle, said oscillating arm, as well as the slotted arm, being actuated by the crank-pin, as hereinafter more fully described. A dog for driving the feed mechanism is also provided, and is actuated by said crank-pin. The play of said dog is regulated by a lever provided for that purpose. The

motionof the needle is produced by a crankpin working in a cam, as hereinafter described.

This invention is illustrated in the accompanying drawings, in which- 2 5 Figure 1 shows a side elevation of the machine, partly in section. Fig. 2 is a section 'in the plane 3 y, Fig. 1. Fig.3 is a sectionjn the plane as m, Fig. 1. Fig. at is a face view of the shuttle containing the bobbin. 4 Fig. 5 is 0 an edge view thereof. Fig. 6 is a vertical central section of the same.

Similar letters indicate corresponding parts.

In the drawings, the letter A represents the base-plate of the machine, from which rises a 3 5 goose-neck, B.

The fly-wheel O is mounted on one end of a horizontal shaft, which, by a crank-pin, a, at the other end of said shaft, working in a heartshaped cam, imparts a rising-and-falling mo- 40 tion to the needle-bar.

On the shaft of the fly-wheel O is mounted a toothed wheel, b, gearing into a toothed wheel, 0, by which motion is imparted to the toothed wheel d, keyed to the horizontal shaft D. The wheel a is provided with a crank, c, to which'a driving-rod may be attached for revolving said wheel.

On the forward end of the shaftD is a crankpin, e, for driving the shuttle. This crank-pin 0 passes through the slotted arm f, which is mounted upon a pin, 9, on which it swings, and which arm f supports the shuttle-carrier. This arm fsupports the shuttle-carrier h, which is connected to the arinfbyapivotm, on which the shuttle-carrier turns. The shuttle-carrier is held down in the position shown in Fig. 2 by a spring, k, attached at one end to said shuttle-carrier and at its other end to the armf. The shuttle l rests on the shuttle-carrier h, as shown in Fig. 2,and is held in place thereon by spring-arms, which press against one side of said shuttle and hold the inner or open face of said shuttle (shown in Fig. 4) against the frame-plate A extending from the baseplate A. The crank-pin 0 also imparts a rising-and-falling motion to the slotted arm 1' swinging about the pivot j, the pin a extending into the cam-slot formed in said arm 1', as shown in Fig. 2.

When the shuttle Z moves forward in the direction of the arrow 1 (shown in Fig.2) the arm m, extending from the shuttle-carrier h, comes into contact with a cam formed in the upper edge of the arm 1', which, being pressed up by the crank-pin 0, causes the shuttle-carrier h to swing up about the pivot a, bringing the shuttle close up to the base-plate A and producing the requisite tension on the shuttlethread. When the shuttle moves back in the direction opposed to the arrow 1' the arm idescends by the action of the crank-pin e, whereby the spring lc is left free to pull the shuttlecarrier h and shuttle 1 back to their original position, away from the base-plate A, whereby the tension is lessened and the breaking of the thread is avoided. This arrangement allows a shuttle to be used which isof a flaring shape, as shown in Fig. 4, whereby alarge bobbin, E, may be inserted, thus supplying a large quantity of threadas, for example, one hundred and fifty to two hundred yards of the average thread used for sewing-machines. The bobbin E revolves about a pivot rising from said shuttle, (see Fig. 6,) and the thread is passed through a series of perforations in the side of the shuttle. (See Fig.5.)'

The feed-wheel p is driven by the dog 0, which is caused to swing in the direction of the arrow 2 in Fig. 3 by the crank-pin c. This dog 0 swings about the shaft to of the feedwheel, and acts on the feed-wheel by means of a friction-clutch or other suitable means, so as to cause it to turn in one direction only. A friction-arm, a, pressing against the side of the feed-wheel p, is also provided, and prevents retrograde motion of said wheel. The dog 0 is provided with an arm, 1", to which is attached a spring or weight, g, and when the dog 0 is freed from the action of the crank-pin c this spring or weight g restores the dog to its original position.

To the dog 0 is attached an arm, 8, over which extends the arm t of a bell-crank lever, t 'v, swinging about a pivot, 11.. By pressing the arm 0 up the dog 0 is pulled back in the direction of the arrow 2, whereby the crankpin 0 is caused to act over a smaller portion of the dog 0, and the motions of the dog 0 and of the feed wheel 19 are decreased, producing smaller stitches.

The shaft to of the feed-wheel p and dog 0 is formed by a pivot held in position by a screw or nut on the forked arm z 2, which extends downward from the base-plate A. Byloosening this nut the shaft w can be raised or lowered on the forked arm 2 2, thus causing a greater or less portion of the periphery of the feed-wheel to project above the base-plate A.

The needle-bar b is provided with a heartshaped cam, d, in which works the crank-pin a. The cam d is provided with a cam-slot having one branch longer than the other, and provided at one point with an elevation or projection, 6. This shape of cam secures the formation. ofa loop in the thread, through which loop the shuttlel passes and forms a complete stitch.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a sewing-machine, the combination of a rotating shaft provided with the crank-pin e, an oscillating slotted arm, f, provided with a shuttle-carrier, and the swinging slotted arm 6, arranged to elevate the shuttle-carrier on its carrying arm at the forward stroke of the latter, substantially as described, for the purpose set forth.

2. In a sewing-machine, the combination of a rotating shaft provided with the crank-pin e, the slotted oscillating arm f, provided with a shuttle-carrier, the slotted swinging arm '5, arranged to elevate the shuttle-carrier on its carrier-arm at the forward stroke of the latter, a feed-wheel, 10, and the swinging feed-dog 0, engaging the feed-wheel, and arranged in the path of the crank-pin e, to intermittently move the feed as the crank-pin rotates, substantially as described.

3. In a sewing-machine, the combination of a crank-pin, e, mounted on a rotating shaft, an oscillating slotted arm, f, supporting the shuttle, the swinging slotted cam-arm i, the feedwheelp, the feed-dog 0, and the bell-crank lever t v, for adjusting the feed-dog, all substantially as and for the purpose described.

4. In a sewing-machine, the combination of the crank-pin e, mounted on a rotating shaft, an oscillating slotted arm, f, a shuttle-carrier, h, pivoted to said arm, and a swinging slotted cam-arm, 5, arranged to elevate the shuttlecarrier, substantially as and for the purpose described.

5; In a sewing-machine, the combination, with the crank-pin e, mounted on a rotating shaft, an oscillating slotted arm, f, provided with a shuttle-carrier, the swinging slotted cam-arm z', a feed-wheel, p, and a feed-dog, 0, arranged in the path of the crank-pin c, of a needle-carrier, b, an attached cam, d, and a crank-pin, a, mounted on a rotating shaft, all substantially as described, for the purpose set forth.

6. In a sewing-machine, the combination of the crank-pin e, mounted on a rotating shaft, a feed-wheel, 19, a feed-dog, 0, arranged in the path of the crank-pin, and having an arm, 8, and a bell-crank lever, t 'v, for engaging the arm 8 to adjust the feed-dog, substantially as described.

In testimony whereof I have hereunto set my hand and seal in the presence of two subscribing witnesses. I

JOSEPH '1'. SCHIMMOLLER. [n s.]

Witnesses J. VAN SAN'rvooRD, ADAM MOLTZ. 

